Update a custom contact field

Authorization

api-key

X-API-Key<token>

In: header

Path Parameters

id*string

Custom field UUID

Request Body

application/json

TypeScript Definitions

Use the request body type in TypeScript.

label?string

Lengthlength <= 200

subscriberEditable?boolean

Whether subscribers can edit this field from the preference center

Response Body

`application/json`

curl -X PATCH "https://example.com/api/v1/custom-fields/string" \  -H "Content-Type: application/json" \  -d '{}'

{  "data": {    "id": "550e8400-e29b-41d4-a716-446655440000",    "workspaceId": "550e8400-e29b-41d4-a716-446655440000",    "key": "plan",    "label": "Plan",    "fieldType": "text",    "subscriberEditable": false,    "createdAt": "2026-01-01T00:00:00.000Z"  }}